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Bölkow Phoebus
The Bölkow Phoebus is a glass fibre composite material, composite competition sailplane, designed and produced in Germany in the 1960s. Large numbers were built, achieving success at some national contests, and many remain active. Design and development The Phoebus was designed at a time when glider manufacturers were moving away from all-wood aircraft towards composite structures. Bölkow had been among the early leaders of this change with their Bölkow Phönix, Phönix T sailplane in the late 1950s, which used balsa/glassfibre sandwich construction. The Phoebus was built in the same way. It is a wing configuration, shoulder wing competition sailplane. The first aircraft, the Phoebus A, was designed to Glider competition classes, Standard Class rules, with a span of 15 m. Its straight tapered wings have an aspect ratio of 17.1; Air brake (aircraft), airbrakes are fitted at 70% chord (aircraft), chord. The fin and rudder are straight edged and only slightly tapered, with a h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is an affinity group for contributors with shared goals within the Wikimedia movement. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sibling projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by ''Smithsonian Magazine, Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T Tail
A T-tail is an empennage wikt:configuration, configuration in which the tailplane of an aircraft is mounted to the top of the vertical stabilizer, fin. The arrangement looks like the capital letter T, hence the name. The T-tail differs from the standard configuration in which the tailplane is mounted to the fuselage at the base of the fin. Advantages T-tails were common in early jet aircraft. Designers were worried that an engine failure would otherwise damage the horizontal tail. The T-tail is very common on aircraft with engines mounted in nacelles on a Wing_configuration#Number_and_position_of_main_planes, high-winged aircraft or on aircraft with the engines mounted on the rear of the fuselage, as it keeps the tail clear of the jet exhaust. Rear-mounting the engines keeps the wings clean and improves short-field performance. This was necessary in early jet aircraft with less powerful engines. T-tail aircraft can have better short-field performance, such as on the Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schempp-Hirth Standard Cirrus
The Standard Cirrus is a Standard-class glider built in Germany by Schempp-Hirth. The Standard Cirrus was produced between 1969 and 1985, when the Discus replaced it. Over 800 examples were built, making it one of the most successful early fibreglass glider designs. Development Dipl Ing designed the Standard Cirrus. Klaus Holighaus flew for the first time in February 1969. It is a Standard Class glider with a 15-metre span and laminar-flow airfoil section designed by Professor Franz Wortmann. The all-moving tailplane, a feature of many designs of that period due to its theoretically higher efficiency, caused less than desirable high-speed stability characteristics, so modifications were made to the early design. The aircraft built before 1972 have a washout of -0.75 degrees. The washout was then increased to -1.5 degrees, improving low-speed performance and slow-speed response. Improvements were made to the Standard Cirrus 75. These included better air brakes with an in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolladen-Schneider LS1
The Rolladen-Schneider LS1 is a Standard Class single-seat glider manufactured in Germany by Rolladen-Schneider from 1968 to 1977. Development The LS-1 Standard Class design was the first aircraft type arising from the partnership between Wolf Lemke and Walter Schneider, who had already worked together as students on the ground breaking Akaflieg Darmstadt D-36. Here, and in subsequent Lemke-Schneider (LS) designs, Wolf Lemke concentrated on the aerodynamics while Walter Schneider contributed mostly to the structural and production issues. The LS1 made its debut at the 1968 German National Championships, taking first and second place with the designers themselves at the controls. The success of this design increased in the subsequent years until, in 1975, it was the most flown glider in the German Nationals. The LS1-c took first place in the 1970 World Championships at Marfa, Texas. Jan Rothhardt also won the World Gliding Competition Championships 2015 in the Club Class. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glasflügel H-201
The Glasflügel 201 Standard ''Libelle'' (German: "Dragonfly") is an early composite Standard Class single-seat sailplane produced by Glasflügel from 1967. Development The 201 was a Standard Class sailplane that was a successor to the H-301 Libelle Open Class glider. It was similar to the H-301, with modifications to meet the Standard Class requirements. The prototype made its first flight in October 1967, with a total of 601 being built. The type soon made its mark in contest flying; one flown by Per-Axel Persson of Sweden, winner of the 1948 World Championships, came second in the Standard Class at the 1968 World Championships at Leszno in Poland. The Libelle and Standard Libelle were very popular and influential designs. Their very light wings and extremely easy rigging set a new benchmark. Their handling is generally good. The 201 was superseded by the Glasflügel 206 ''Hornet''. Design The Standard Libelle (201) is of similar glassfibre construction to the H-301 Lib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fédération Aéronautique Internationale
The World Air Sports Federation (; FAI) is the world governing body for air sports, and also stewards definitions regarding human spaceflight. It was founded on 14 October 1905, and is headquartered in Lausanne, Switzerland. It maintains world records for aeronautical activities, including ballooning, aeromodeling, and unmanned aerial vehicles (drones), as well as flights into space. History The FAI was founded at a conference held in Paris 12–14 October 1905, which was organized following a resolution passed by the Olympic Congress held in Brussels on 10 June 1905 calling for the creation of an Association "to regulate the sport of flying, ... the various aviation meetings and advance the science and sport of Aeronautics." The conference was attended by representatives from 8 countries: Belgium (, founded 1901), France ( Aéro-Club de France, 1898), Germany ( aka "German Airship League", founded 1902), Great Britain (Royal Aero Club, 1901), Italy (, 1904), Spain (, 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic Ocean, South Atlantic and Indian Ocean; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; to the east and northeast by Mozambique and Eswatini; and it encloses Lesotho. Covering an area of , the country has Demographics of South Africa, a population of over 64 million people. Pretoria is the administrative capital, while Cape Town, as the seat of Parliament of South Africa, Parliament, is the legislative capital, and Bloemfontein is regarded as the judicial capital. The largest, most populous city is Johannesburg, followed by Cape Town and Durban. Cradle of Humankind, Archaeological findings suggest that various hominid species existed in South Africa about 2.5 million years ago, and modern humans inhabited the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Gliding Championships
The World Gliding Championships (WGC) is a gliding competitions, gliding competition held roughly every two years by the FAI Gliding Commission. The dates are not always exactly two years apart, often because the contests are always held in the summer in either the Southern Hemisphere or Northern Hemisphere. History Gliding had been a demonstration sport at the 1936 Summer Olympics and was due to become an official Olympic sports, Olympic sport in the Helsinki Games in 1940 Summer Olympics, 1940. However, since the Second World War, gliding has not featured in the Olympic Games, Olympics, and so the World Championships are the highest level in the sport. There are now contests for six Glider competition classes, classes of glider (sailplane), glider and so in recent years the Championships have been divided between two locations. The women's, junior, grand prix and aerobatic events are also held separately. Each of the following entries give the year and location of the contest fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drogue Parachute
A drogue parachute, also called drag chute, is a parachute designed for deployment from a rapidly moving object. It can be used for various purposes, such as to decrease speed, to provide control and stability, as a pilot parachute to deploy a larger parachute or a combination of these. Vehicles that have used drogue parachutes include multistage parachutes, aircraft, and spacecraft recovery systems. The drogue parachute was invented by Russian professor and parachute specialist Gleb Kotelnikov in 1912, who also invented the knapsack parachute. The Soviet Union introduced its first aircraft fitted with drogue parachutes during the mid 1930s; use of the technology expanded during and after the Second World War. A large number of jet-powered aircraft have been furnished with drogue parachutes, including the Boeing B-52 Stratofortress strategic bomber and the Eurofighter Typhoon multirole aircraft; they were also commonly used within crewed space vehicle recovery programmes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monowheel
A monowheel or uniwheel is a type of one-wheeled, single-track vehicle. Unlike the unicycle, a monowheel consists of a large, hollow wheel that loops above and around the driver. Monowheels are typically powered by an engine as with a motorcycle, with a chassis securing the steering, driver's seat, and propulsion mechanism to the interior of the wheel. Hand-cranked and pedal-powered monowheels were patented and built in the late 19th century; most built in the 20th and 21st century have been motorized. Some modern builders refer to these vehicles as monocycles, though that term is also sometimes used to describe motorized unicycles. A world speed record for a motorized monowheel was set in 2016, at 98.464 km/h (61.18 mph). Stability Similar to bicycles, monowheels are stable in the direction of travel, but have limited horizontal stability. This is in contrast to unicycles which are unstable in both directions. Monowheels have also been found to have a lower speed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
